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The heat capacity and thermal conductivity measurements of 1-cyanoadamantane samples were carried out for temperatures between 2 K and 225 K. Particular polymorphic states were obtained due to different thermal treatment made on samples. The heat capacity for both phases (monoclinic and glass-like) seems to be equivalent to each other below 75 K. The absence of linear temperature dependence of heat capacity at lowest temperatures for glass-like state results probably from insufficient measurement range. For monoclinic phase one can determine jump in heat capacity values at around 200 K, which is connected with the shift of phase transition between monoclinic and supercooled metastable cubic phase. Thermal conductivity measurements enabled to observe besides monoclinic and glass-like also few metastable states. Results obtained from monoclinic phase resembles the behavior of dielectric crystals with an exception of low temperature power dependency, T2.69 instead of T3. Glass-like phase results imitate curves typical for amorphous materials, only the characteristic plateau is shifted towards higher temperatures and broader than usual.
Słowa kluczowe
Wydawca
Czasopismo
Rocznik
Tom
Strony
22--23
Opis fizyczny
Bibliogr. 11 poz., rys.
Twórcy
autor
- W. Trzebiatowski Institute of Low Temperature and Structure Research PAS, Department of Low Temperatures and Superconductivity, Okólna 2, 50-422 Wrocław Poland
autor
- W. Trzebiatowski Institute of Low Temperature and Structure Research PAS, Department of Low Temperatures and Superconductivity, Okólna 2, 50-422 Wrocław Poland
Bibliografia
- [1] K. Binder et al., Adv. in Phys. 41, 6 547 (1992)
- [2] M. Zuriaga et al., Phys. Rev. Lett. 103, 075701 (2009)
- [3] M. Romanini et al., Phys. Rev. B 85, 134201 (2012)
- [4] R. Fabiański et al., J. Chem. Phys. 116, 23 10356 (2002)
- [5] B. Kuchta et al., J. Chem. Phys. 109, 16 6753 (1988)
- [6] J. C. Lashley et al., Cryogenics 43, 369 (2003)
- [7] T. Zakrzewski et al., Polish Techn. Rev. 7, 13 (1976)
- [8] O. Yamamuro et al., J. Phys. Soc. Jpn. 68, 2969 (1999)
- [9] P. Debye, Ann. Phys. 344, 789 (1912)
- [10] G. Leibfried et al., Nach. Akad. Wiss. Gottingen, Math. Phys. Klasse 4, 71 (1954)
- [11] R. Berman, Thermal Conduction in Solids, Oxford University Press (1976)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-c03e4caa-7bb5-4499-81be-a6665c668c82